Compound box



March 3, 1931. `o. B. ANDREWS 1,794,821

COMPOUND BOX Filed sept. 4, 1929 2 sheets-sheet 1 A TTORNEY March 3,1931. Q B ANDREWS 1,794,821

COMPOUND BOX Filed Sept. 4. 1929 2 Sheets-Sheet 2 INVENToR. .fl/Nn f5, @um

BY M20.

ATTORNEY.

Patented Mar 3, 1931 p UNITED STATES PATENT oFFicE OLIVER B. ANDREWS, 0F CHATTANOOGA, TENNESSEE COMPOUND BOX Application led September 4, 1929. Serial Non A390,234.

I The box in particular comprises an inner container of folded box board which is inserted within an outer sleeve formed of relatively stif waterproof material. The sleeve is closed by separate top and bottom elements which areprovided with flanges extending between the inner box and the outer -sleeve by means of which the elements are secured.

In accordance with the present invention the ianges on the top and bottom elements are so formed that`they may be readily inserted between the inner and outer sections of the box and are frictionally held in place. The entire assemblyI may then be secured by straps surrounding the outer box. e

The invention also consists in certain new and original features of construction and combinations of parts hereinafter set forth and claimed.

Although the novel. features which are believed to be characteristic of this invention `will be particularly pointed out in the claims appended hereto, the invention itself, as to its objects and advantages, the mode of its operation and the manner df its organization ma be better understood by referring to the fol owing description taken in connection with the accompanying drawings forming a part thereof, in which Fig. 1 is a perspective view partly in section showing the assembled box;

Fig. 2 is a section taken on the line 2-2 of F1g.41;

Fig. 3 is a perspective of the inner box showlng the construction thereof;

Fig. 4 is a perspective view of Ithe comnent parts of the box showing the inner lligx telescoping within the outer sleeve;

Fig. 5 is a perspective view of the component parts of the box inl disassembled relationship Fig. 6 is an enlarged detail view offa p0rtion ofthe blank from which the top and bottom sections are formed; and

Fig. 7 is a sectiontaken on the line 7-7 of Fig. 6.

tively. The top Like referencel characters` denote like parts in the several figures of the drawings.

In the followingb description and in the claims parts will e identified by specific names for convenience, but they are intended `to be as generic in their application to similar parts as the art will permit.`

Referringlto the drawingsl more in detail, the invention is shown as comprising a com-v pound box formed of an inner container (Fig. 3) comprising side members 10 and end members 11 together with side laps,12 and end flaps 13, which is formed from a blank in any desired manner. The box may be folded as shown in Fig. 3 and secured by suitable means suchas tape le attached to adjacent surfaces 10 and ll after which aps 12 and 13 may be 'folded inward] to form a completely closed box as shown lin Figs. 4 and 5.

The inner container is preferably formed of corrugated board or other stid box board vand is suitably creased to permit the various surfaces to be folded into their desired ositions. Due to the thichess of the boar the creasesare in the form of'a slight roll rather) than a sharp bend. rThis feature is utilized, as will be pointed out hereinafter in distributing stresses to which the box is subjected and avoiding crushing.

The outer sleeve comprises a pairof side members 17 which are provided with inturned flan es 18. These [Hanges are secured to end memersl) b suitable means, such as stitches 20. It is to e noted that the corners of the sleeve are reenforced by the double thickness of flanges 18 and end members 19. This is also an important feature in impart-- in the desired rigidity to the assembled box.

op member 2l and 4bottom member 21a are made from a blank of box board which is suitably cut to form iaps 22 and 23 respecand bottom members are preferably identical, hence only one ofthese members has been shown in detail.A

Referring to Figs. 6 and '7, compound creases 24 areformed inthe box board between cover .21 and flaps 22. These creasesl `are so arranged that strip 254 which is ineluded therebetween is bent at an angle inter- 4 This is shown in dotted lines in Fig. and in Fig. 2 in which strip 25 isbent at an angle of 45 to cover member 21, and iap 22 is bent at an angle of 90 to said cover member.

Edges 26 of fiaps 22 are inclined with respect to creases 24 whereby the flaps are formed siightlywedge shaped. When the aps are bent into upright position the inclined edges 26 form an open notch on the four corners of the top member which permits iaps 22 to be more readily inserted between the inner container and the outer sleeve. It is to be noted that edge 26 is formed on the blank (Fig. 6) as a straight line extending through iaps 22 and strips 25. Both of these elements are accordingly wedge shaped. When strip 25 is bent at an angle of 45, as shown in Figs. 4 and 5, the adjacent portions of flaps 22 at the corners of the cover member are separated by an appreciable distance which provides clearance at the corners of the box when the flaps are inserted between the inner and outer members. This construction permits iaps 22 to be extended approximately to the corners of the box without binding and interfering with the assembly thereof.

Bottom member 21a and flaps 23 are similarly formed, and it is to be understood that the descri tion above applies equally to that portion o the box. n

The outer sleeve and the top and bottom members are preferably formed of a heavy iber board whichI has been impregnated on the inside and outside with a waterproofing solution which `hardens on drying to produce a 'particularly hard surface. A solution of silicate of soda has beenfound suitable for this purpose. This solution penetrates the board to a slight extent and produces a coating which is both rigid and impervious to moisture. The strength of the fiber board so treated is materially increased and a more rigid box ,is produced.

In assembling the above described box the material to be shipped is packed within the inner container after which flaps 12 and 13 are folded to completely close the same. The inner container is then placed within the outer sleeve and the top and bottom members are inserted in their proper place. After this the entire box may be held closed by suitable bands 30 which may be of any strong material, such as thin metal.

When a box of this character is subjected to hard usage, as for example, a blow on one corner, the blow is absorbed by the double thickness at the corner of the outer sleeve and is transmitted through the flaps 22 and 23 to the inner container where it is distributed over a considerable portion of the adjacentv surface. The V-shaped opening between adjacent flaps 22 and 23 'prevents the blow from being transmitted directly to the corner of the inner container. The rounded creases of the inner container also provide a slight clearance between the two. elements and help in securingthe proper distribution of stresses.

If the blow on the corner of the box is occasioned by allowing the box to fall, the

material within the box will exert pressure from the inside which is distributed over a comparatively large area of the outer sleeve in a similar manner.

The box is particularly applicable to the shipment of heavy articles and has been used, for example, for cordage in amounts up to 400 lbs. It has been found that boxes of this size were capable of withstanding shocks which would fracture a thin wooden 4crate which had heretofore been used for the same purpose. Furthermore, the resilience of the box board and the even distribution of the stresses prevent the material from becoming chafed or injured under ordinary conditions of usage.

While certain novel features of the invention have been shown and described and are pointed out in the annexed claims, it will be understood that various omissions, substitutions and changes in the forms and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention.`

What is claimed is:

1. In a folded box, an inner container of folded box board, an outer sleeve completely surrounding ysaid inner container, top and bottom members having fiaps secured thereto adapted to be inserted between said inner container and said sleeve, said iaps being wedge shaped whereby notches are provided at the corners of the box to permit a clearance between the linner container and the outer sleeve at those points.

2i. A strong folded box comprising an inner container having flanges infolded-to form a complete closure, an outer sleeve surrounding said inner container, top and bottom members having inturned iiaps and intermediate strips between said members and said iaps extending at an angle intermediate to the angle of said flaps with respect to said member, said flaps being vinserted between said sleeve and said inner container.

3. A str'ong folded box comprising an inner container having flanges infolded to form a complete closure, an outer sleeve of liber board comprising side` members and end members, top and bottom members having inturned flaps and intermediate strips between said members and said flaps extending at an angle intermediate to the angle of saidflaps with respect to said member, said flaps and intermediate strips having inclined edges whereby clearance is provided at the corners, said flaps being inserted. between said sleeve and said inner container.

p flaps being inserted between said sleeve and said inner container.

5. A strong folded box comprisin an inner container of corrugatedbox boar having flanges infolded to form a complete closure, an outer sleeve of stiff ber board comprislng .f and end members stitched to said flanges at vthe corners of said sleeve, top and bottom members of sti ber board having inturned flaps and intermediate strips between said members and said aps extending at an angle intermediate to the angle of said aps with respect to said member, said flaps and intermediate strips having inclined edges whereby clearance is provided at the corners, said flaps being inserted between said sleevel and said inner container.

6. A strong folded box comprisin an inner container of corrugated box boar having flanges infolded to form a complete closure, the creases about which said aps are folded comprising a slight roll, an outer sleeve of stiff ber board comprising side members having inturned anges and end members stitched to said flanges at the corners of said sleeve, top and bottom members of stiff ber board having inturned aps and intermediate strips between said members and said flaps extending at an angle intermediate-tov the angles of said flaps with respect to said member, said flaps and intermediate strips having inclined edges whereb clearance iS. provided at the corners, said aps being inserted between said sleeve and said inner contamer, and means comprlsmg bands of stifll material surrounding said box for hold- Y ing said elements in assembled position.

7. A strong folded box comprisin an inner container of corru ated box board aving anges infolded to form a complete closure, the creases about which said aps are folded comprising a slight roll, an outer sleeve of stiff ber board comprising side members having inturned anges and end members stitched to said flanges at the corners of said sleeve, top and bottom members of stiff ber board having inturned iaps and intermediate strips between said members and said aps extending at an anglel intermediate to the angle of said flapswith respect to said member, said aps and interside members having inturned flanges mediate strips havin inclined edges whereby clearance is provi ed at the corners, said a s being'inserted between said sleeve and said inner container, said sleeve and said top and" bottom members having a hard waterproof surface.

8. A strong folded box comprising a closed inner container2 an outer sleeve of box board surrounding sald container, top and bottom members of stiff box board having inturned flaps and intermediate strips between said members and said aps extending at an angle intermediate to the angle of said `fia with respect to said member, said flaps aniisintermediate strips havin inclined edges whereby clearance is provi ed at 4the corners, said fiaps being inserted between said sleeve and said inner container, said sleeve and said to and bottom members being impregnated wit top and bottom members being impregnated with a solution of silicate of soda.

In testimony whereof I have hereunto set my hand.

OLIVER B. ANDREWS. 

